@vidister ZFS is definitely required for maximum sound reproduction. The very low latency of an array of disks and fast seek allow for the DAC to never be starved. The parity bits going back to the CPU with the data provide a gentle filter to the data, shielding it from the electrostatic noise of your other components. The recommended configuration is 5 disks raidz2, mirrored. The mirroring allows to filter off machine noise from signal, again improving clarity.